/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */

package org.apache.iotdb.db.storageengine.dataregion.compaction.selector.estimator;

public class FastCompactionInnerCompactionEstimator extends AbstractInnerSpaceEstimator {

  /**
   * The metadata algorithm is: maxChunkMetaDataSize * maxChunkNumber * fileSize * maxSeriesNumber
   *
   * @return estimate metadata memory cost
   */
  @Override
  public long calculatingMetadataMemoryCost(InnerCompactionTaskInfo taskInfo) {
    return taskInfo.getFileInfoList().size()
        * taskInfo.getMaxChunkMetadataNumInDevice()
        * taskInfo.getMaxChunkMetadataSize()
        * Math.max(config.getSubCompactionTaskNum(), taskInfo.getMaxConcurrentSeriesNum());
  }

  /**
   * The data algorithm is: (targetChunkSize * fileSize * compressionRatio * maxSeriesNumber) +
   * modsFileSize
   *
   * @return estimate data memory cost
   */
  @Override
  public long calculatingDataMemoryCost(InnerCompactionTaskInfo taskInfo) {
    long cost =
        config.getTargetChunkSize()
            * taskInfo.getFileInfoList().size()
            * Math.max(config.getSubCompactionTaskNum(), taskInfo.getMaxConcurrentSeriesNum());
    cost += taskInfo.getModificationFileSize();
    return cost;
  }
}
